<template>
  <div
    class="HeaderUpLoadBox"
    :class="{
      dark: theme.state.themeState == 'drak',
      light: theme.state.themeState == 'light',
    }"
  >
    <div class="cropper-content">
      <div class="cropper-box">
        <vue-cropper
          ref="cropper"
          :img="option.img"
          :outputSize="option.outputSize"
          :outputType="option.outputType"
          :info="option.info"
          :canScale="option.canScale"
          :autoCrop="option.autoCrop"
          :autoCropWidth="option.autoCropWidth"
          :autoCropHeight="option.autoCropHeight"
          :fixed="option.fixed"
          :fixedNumber="option.fixedNumber"
          :full="option.full"
          :fixedBox="option.fixedBox"
          :canMove="option.canMove"
          :canMoveBox="option.canMoveBox"
          :original="option.original"
          :centerBox="option.centerBox"
          :height="option.height"
          :infoTrue="option.infoTrue"
          :maxImgSize="option.maxImgSize"
          :enlarge="option.enlarge"
          :mode="option.mode"
          @realTime="realTime"
          @imgLoad="imgLoad"
        >
        </vue-cropper>
      </div>
      <div class="btn">
        <div class="changeImg">
          <input type="file" @change="selectImg" />
        </div>
        <div class="reset close">取消</div>
        <div class="uploadImg" @click="uploadImg('blob')">上传</div>
      </div>
      <!--预览效果图-->
      <div class="show-preview">
        <div class="preview">
          <img :src="previews.url || headerImg" :style="previews.img" />
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import "vue-cropper/dist/index.css";
import { Options, Vue } from "vue-class-component";
import { useStore } from "vuex";
import { VueCropper } from "vue-cropper";
import axios from "axios/dist/axios";
import { ElMessage } from "element-plus";

@Options({
  components: {
    VueCropper,
  },
  mounted() {
    this.headerImg = this.theme.state.login.userInfo.headerImg;
  },
})
export default class HeaderUpLoad extends Vue {
  theme = useStore();
  headerImg = "";
  headersImgName = "";
  headersType = "";
  previews = {};
  option = {
    img: "", //裁剪图片的地址
    outputSize: 1, //裁剪生成图片的质量(可选0.1 - 1)
    outputType: "png", //裁剪生成图片的格式（jpeg || png || webp）
    info: true, //图片大小信息
    canScale: true, //图片是否允许滚轮缩放
    autoCrop: true, //是否默认生成截图框
    autoCropWidth: 100, //默认生成截图框宽度
    autoCropHeight: 100, //默认生成截图框高度
    fixed: true, //是否开启截图框宽高固定比例
    fixedNumber: [5, 5], //截图框的宽高比例
    full: false, //false按原比例裁切图片，不失真
    fixedBox: true, //固定截图框大小，不允许改变
    canMove: true, //上传图片是否可以移动
    canMoveBox: true, //截图框能否拖动
    original: false, //上传图片按照原始比例渲染
    centerBox: true, //截图框是否被限制在图片里面
    height: true, //是否按照设备的dpr 输出等比例图片
    infoTrue: true, //true为展示真实输出图片宽高，false展示看到的截图框宽高
    maxImgSize: 3000, //限制图片最大宽度和高度
    enlarge: 1, //图片根据截图框输出比例倍数
    mode: "700px 500px", //图片默认渲染方式,
  };

  upload = "";
  handleExceed(files) {
    upload.value.clearFiles();
    upload.value.handleStart(files[0]);
  }
  submitUpload() {
    upload.value.submit();
  }
  //初始化函数
  imgLoad(msg) {
    console.log("工具初始化函数=====" + msg);
  }
  //图片缩放
  changeScale(num) {
    num = num || 1;
    this.$refs.cropper.changeScale(num);
  }
  //实时预览函数
  realTime(data) {
    this.previews = data;
  }
  //选择图片
  selectImg(e) {
    let file = e.target.files[0];
    this.headersImgName = file.name;
    if (!/\.(jpg|jpeg|png|JPG|PNG)$/.test(e.target.value)) {
      ElMessage.error("图片类型要求：jpeg、jpg、png");
      return false;
    }
    this.headersType = file.type;
    //转化为blob
    let reader = new FileReader();
    reader.onload = (e) => {
      let data;
      if (typeof e.target.result === "object") {
        data = window.URL.createObjectURL(new Blob([e.target.result]));
      } else {
        data = e.target.result;
      }
      this.option.img = data;
    };
    //转化为base64
    reader.readAsDataURL(file);
  }
  //上传图片
  uploadImg(type) {
    if (type === "blob") {
      //获取截图的blob数据
      this.$refs.cropper.getCropBlob(async (data) => {
        //blob转file
        var file = new File([data], this.headersImgName, {
          type: this.headersType,
          lastModified: Date.now(),
        });
        let formData = new FormData();
        formData.append("header", file);
        axios
          .post("https://www.lv666.top:8882/file/headerUp", formData, {
            headers: {
              "Content-Type": "multipart/form-data",
              Authorization: localStorage.getItem("token"),
            },
          })
          .then((res) => {
            let { data } = res;
            if (data.flag) {
              //更新数据
              this.theme.dispatch("userInfoChange", "");
              ElMessage.success("头像修改成功！");
            } else {
              ElMessage.error("【ERROR】" + data.msg);
            }
          })
          .catch((err) => {
            ElMessage.error("【ERROR】服务器连接断开，请稍后重试！");
          });
      });
    }
  }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped lang="less">
@import url("../../assets/less/global.less");
@import url("./index.less");
</style>
